Knowledge / Trivia tests -» Physics -» Other Physics

Light, imaging

94 Questions - Developed by: V - Developed on: 2016-12-08 - 1,730 taken

1

- emissions of photons are caused by excitations of interacting atoms

True

False

2

- emissions of photons are caused by de-excitations of atoms

True

False

3

- atoms can be excited by absorption of any (whatever) photon

True

False

4

- atoms can be excited by absorption of photons with the energy = E2 -E1; (E1: the energy of basic state, E2: the energy of excited state of the atom)

True

False

5

- atoms can be excited by absorption of photons with the energy E2-E1; (E1, E2: the energies of different excited states of the atom)

True

False

6

- atoms can be excited by absorption of photons with the frequency ν = (E2-E1) / h ; (E1: the energy of excited state, E2: the energy of basic state of the atom)

True

False

7

- infrared light has lower intensity than the visible light

True

False

8

- infrared light has higher intensity than the visible light

True

False

9

- visible light has lower intensity than the ultraviolet light

True

False

10

- visible light has higher intensity than the ultraviolet light

True

False

11

- infrared light has lower wavelength than the visible light

True

False

12

- infrared light has higher wavelength than the visible light

True

False

13

- infrared light has higher wavelength than the ultraviolet light

True

False

14

- photons of visible light carry lower energy than the photons of ultraviolet light

True

False

15

- photons of visible light carry lower energy than the photons of infrared light

True

False

16

- spectrum of monochromatic light is one spectral line

True

False

17

- spectrum of polychromatic light is one spectral line

True

False

18

- spectrum of polychromatic light can be continuous

True

False

19

- spectrum of polychromatic light can contain several spectral lines

True

False

20

- dependence of the number of absorbed photons on energy of these photons represents
the absorption spectrum

True

False

21

- population metastability within the active laser medium is required for laser beam
generation

True

False

22

- pressure inversion within the active laser medium is required for laser beam generation

True

False

23

- population inversion within the active laser medium is required for laser beam
generation

True

False

24

- metastability of basic state of molecules or atoms of active laser medium is required
for laser beam generation

True

False

25

- light dispersion causes the opening aberration of lens

True

False

26

- irregular curvature of the cornea causes spherical aberration (e.g. nearsightedness)

True

False

27

- irregular curvature of the cornea causes aspherical aberration

True

False

28

- outer light has to penetrate several optical media with different refractive indexes before reaching the eye retina

True

False

29

- light penetrates several eye structures to reach the retina; the lowest refraction is
observed between the air and the cornea

True

False

30

- light penetrates several eye structures to reach the retina; the lens contributes mainly to the total eye power

True

False

31

- index of refraction depends on the wavelength of light

True

False

32

- index of refraction depends on the speed of light

True

False

33

- index of refraction depends on the medium through which the light travels

True

False

34

- index of refraction is expressed in m/s2

True

False

35

- index of refraction is expressed in m/s

True

False

36

- index of refraction is expressed in m . s

True

False

37

- index of refraction depends on the angle of incidence of light

True

False

38

- critical angle is maximum possible angle when the light beams penetrate from the air
into the prism

True

False

39

- critical angle is minimum possible angle when the light beams penetrate from the air
into the prism

True

False

40

- critical angle is minimum possible angle when the light beams penetrate from the prism into the air

True

False

41

- critical angle is maximum possible angle when the light beams penetrate from the
prism into the air

True

False

42

- magnification of the lens can be expressed as a ratio between the image and object
heights

True

False

43

- magnification of the lens can be expressed as a ratio between the image and object
widths

True

False

44

- magnification of the lens can be expressed as a ratio between the distances to the object and to the image

True

False

45

- magnification of the lens is expressed in dioptres

True

False

46

- magnification of the lens is expressed in (dioptres-1)

True

False

47

- magnification of the lens can be expressed in per cent

True

False

48

- magnification of the converging lens can be expressed as a ratio between the distances
from the lens center to the image and from the lens center to the object

True

False

49

- the unit of optical power of eye is lux

True

False

50

- the unit of optical power of eye is dioptre

True

False

51

- the focal length of converging lens with the optical power of 5D is 20 cm

True

False

52

- the focal length of converging lens with the optical power of 5D is 2 cm

True

False

53

- the shorter the focal length of converging lens, the lower its refractivity

True

False

54

- the shorter the focal length of converging lens, the higher its refractivity

True

False

55

- the lower the radius of converging lens curvature, the lower the lens refractivity

True

False

56

- the higher the radius of converging lens curvature, the higher the lens refractivity

True

False

57

- fictive (non-real) image is produced on eye retina

True

False

58

- real image is produced on eye retina

True

False

59

- image on eye retina is inverted (inverse)

True

False

60

- image on eye retina is not straight (direct)

True

False

61

- image on eye retina is reduced (smaller than the object)

True

False

62

- image on eye retina is magnified (enlarged)

True

False

63

- resolution of light microscopes is proportional to the wavelength of used light and inversely proportional to the refractive index of environment between the slide (preparation) and the objective

True

False

64

- resolution of light microscopes is proportional to the wavelength of used light

True

False

65

- resolution of light microscopes depends on the refractive index of environment between the slide (preparation) and the objective

True

False

66

- magnification of microscope is a sum of magnifications relevant to individual optical parts of microscope, usually and mostly the sum of objective and eyepiece magnifications

True

False

67

- magnification of microscope is a ratio of magnifications relevant to individual optical parts of microscope, usually and mostly the ratio of objective and eyepiece magnifications

True

False

68

- magnification of microscope is a product of magnifications relevant to individual optical parts of microscope, usually and mostly the product of objective and eyepiece magnifications

True

False

69

- optimum magnification of microscope is usually attained by higher magnification of eyepiece and lower magnification of objective

True

False

70

- optimum magnification of microscope is usually attained by higher magnification of objective and lower magnification of eyepiece

True

False

71

- optimum magnification of microscope is usually attained by equal magnification of eyepiece and objective

True

False

72

- magnification of microscopes behind the optimum is called „empty magnification“, since this magnification does not allow to detect more details of an object

True

False

73

- magnification of microscopes below the optimum is called „empty magnification“, since this magnification does not allow to detect more details of an object

True

False

74

- each lens with optical power more than 4 D can be used as a magnifying glass

True

False

75

- each lens with optical power less than 4 D can be used as a magnifying glass

True

False

76

- converging lenses with high optical powers work as magnifying glasses if the object is placed in the focal distance or even closer to the lens

True

False

77

- converging lenses with high optical powers do not work as magnifying glasses if the object is placed further than the focal distance of the lens

True

False

78

- we observe real images of observed objects using both the magnifying glasses and microscopes

True

False

79

- we observe real images of observed objects using magnifying glasses, but fictive images in microscopes

True

False

80

- we observe real images of observed objects using microscopes, but fictive images in magnifying glasses

True

False

81

- a numerical aperture depends on an amount of light beams (the angle size), which gets in the objective from the observed spot (numerical aperture influences a resolution of the microscope)

True

False

82

- refractometric measurements of substance concentration employ the changes of the critical angle magnitude with changes of solution concentration

True

False

83

- spectrophotometric measurements of substance concentration employ the changes of the critical angle magnitude with changes of solution concentration

True

False

84

- we adjust and observe colour boundary at the position of critical angle during the measurement with refractometer

True

False

85

- converging lenses always produce real images of objects (regardless the position of objects to the lens)

True

False

86

- converging lenses can produce fictive images of objects

True

False

87

- fictive images are characterized by the fact that the light (photons) does not produce any image on the eye retina

True

False

88

- microscopes produce real images of observed objects because the function of eyepiece (ocular)

True

False

89

- microscopes produce real images of observed objects because the function of objective

True

False

90

- magnification of magnifying glass depends mostly on object position and very little on the lens optical power

True

False

91

- magnification of magnifying glass depends mainly on the lens optical power

True

False

92

- during the measurement of the size of objects using the microscope one must calibrate the ocular scale

True

False

93

- during the measurement of the distance to objects using the microscope, one must calibrate the ocular scale

True

False

94

True

True

False

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